... , it has the merits of longer usage life, better safety, high illuminance, small consumption, work temperature low, workable voltage range wide ... good features of Longer usage life ,maintenance-free, security level high ,the work life of the LED light source greater than ... brightness has no any change. Technical Data TypeRage Voltage (V)Rate power (W)Frequency (Hz)Illumination (lx)Work temperature (°C) ...